Improvement in steam-valves



UNITED STATES PATENT OFFICE.

JAMES B. WOOD, OF LANSINGBURG, NEW YORK.

`IMPROVEM ENT IN STEAM-VALVES.

Specification forming part of Letters Patent No. 57,424, dated August 21, 1866.

To all whom it may concern:

Be it known that I, JAMES B. WOOD, of Lansingburg, Rensselaer county, and State ot New York, have invented a new and useful Improvement in Steam-Valves; and I do hereby declare that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference being had to the aecompanying drawings, forming part of this specification. y

The present invention relates to a novel improvement in the construction of steam-valves, whereby many important advantages are obtained, among which may be mentioned that while the cost of making the valve is but very little increased, it' any, its seatcan be readily and easily ground by the valve itself, and valves made upon the old plan can be, with but very little expense, altered according to the present improvement, as will be obvious from the following det-ail description thereof, reference being had to the accom panying plate ot drawings, in which- Figure 1 is a central longitudinal vertical section through the valve, showing its stem and handle connected with it in side elevation; and Fig. 2, a horizontal section taken in the plane of the line x, Fig. 1.

A in the drawings represents the couplingl portion of the valve, in each end B of which a female screw-thread is made suitable for forming the desired connection with the steampipes, the coupling A in its center being divided into two parts or sections by means of a partition-plate, c, having an aperture, D, that forms the seat of the valve E, secured to one end of a stem, F. This stem F has a screw-thread, a, formed around it for a portion of its length, which screws into the female screwthread b of a tubular nut, G, that is loose within the outer casing, H, screwed by its lower end within the center opening, I, of the valve-coupling chamber, but is prevented from turning around in the said casing H by interlocking the projections d of its upper end with corresponding-shaped notches f of the said easing H, as plainly shown in Fig. 2 of the drawings. J is the stufngbox, screwed upon and over the upper end ot' the casing H, through which stuffing box the valve-stem F extends, and is provided with the ordinary handle K for convenience in turning it.

From the above description of the construction ofthe valve it is obvious that if the stuf ing-box be unscrewed fiom the Casing H, and then the inner tubular nut raised sufficiently within the said casing to disengage its projections therefrom, the valve-seat, by simply turning the valve around with its nut within the casing H, can be then ground with ease and readiness and with the utmost accuracy-an advantage ofthe utmost importanceand that, furthermore, to alter a valve made in the old manner according to the present invention it is only necessary to turn oft the outside case of such valve and to tit another to and over it, as .is obvious without. any further explanation.

I claim as new and desire to secure by Letters Patent- 'lhe outer casing, H, inner and independent nut, G, having projections interlocking with the notches in the said outer easin g, and valvestem F, 'when combined together substantiall y as and for the purposedcscribed.

JAMES B. IVOOD.

Witnesses:

JOHN BowDEN, EBENEZER Woon. 

